Improvement in machines for pulverizing ores and rock



'UNITED Err'Afines` VPe'rnlw'r OFFICE VANBUREN Terrasson, on new YORK, N. Y.

IMPROVEMENT iN MACHINES FQR PuLvERiziNc yomis AND ROCK.

Specification forming part of Letters-Patent No. 97,445, dated November 30, 1869.

view; Fig. an elevation ofthe side opposite toy the one representedin Fig. l; Fig. 4, an

en d elevation ,cF-ig. 5, a longitudinal section,

taken in the vertical plane of the linje X ai of Fig. 2; Fig. 6, another longitudinal section, taken in the horizontal plane of' the line A a, of Fig. 5; Fig. 7, an enlarged view of one of the beaters, and Fig. 8 a sec-tionof the same on the same scale, taken inthe vertical plane of the line B b of Fig.` 6.

The same letters indicate like parts in all the figures.

In the accompanying drawings, A and A represent two circular' cases, whose inner peripheries are cylindrical, and sides parallel, and placed by preference one forward of the other, and firmly connected with each other and to a y suitable bed-plate. I prefer to make each casein two parts, coming` together in ahorizontalv plane of the axis, and provided with flanges.

c a, so that the two parts can be iirmly connected by bolts b. VV'ithinv the rim cof each of the said cases is firmly secured an inner rim, d, made in two parts like the case. `These inner rims, there being one'for each case, I prefer to make of chilled' cast-iron, the better to resistthe abrasion of the material to be operated on, and this inner rim should be secured to the outer case by means of screws, so that it can be taken out and renewed when worn. The cases have each a concentric shaft, C, extending through andhaving' their bearings in suitable boxes j' f, mounted on standards y g. And the two shafts are provided' with pulleys It h', to receivebelts from some suitable motor to drivethem at high velocities, preferring to drive the `shaft C at about one-third greater velocity than the tirst one C. Each shaft carries a wheel, D D', from the periphery of which project four radial beaters i, the edges of which just clear the sides of each side.

.the case and the innerperiphery of the inner rim d. Each wheel is a disk, and the one D `is located in the case A, and at that side ot' it farthest from the feeding-tube, so as to leave ample room for the passage ofthe ore or rock, but it should not be placed so near the side opposite to the feeding-tube as to rub against it. And on the periphery of this disk, and projecting from one side, are four projections or flan ges, j, to the faces of which are secured, by bolts 7c, plates t', which are the beaters. And, in the case A', the wheel D is a disk like the other, but placed in the middle ofthe case, so as to leave a passage on each side for the passage of the partially-broken ore or rock which enters into the case on both sides from the case A. The projections or -flanges j on this wheehto which the beatersi are bolted, project on each side of the wheel. The plates z', or faces ot the beaters, I prefer Vto make of chilled cast-iron. The case A is provided with a feeding-spout, l, which communicates with'v the inside of the casey at a short distance from theshat't, and the lumps of ore or rock to be operated upon are fed in through this tube, which, for convenience, may be surmounted by a suitable hopper. And the inside of the case A, near the inner periphery, communicates with the inside of the other case A', near the shaft, by means of two pipes m m, 011e on pipes must lie-near4 the top of the case A, and the pipes be curved upward, so that the particles of partiallybroken ore or rock may be -carried into the pipes by momentum as well as by the pressure of the air induced by the rotation of the beaters. -And the case A is provided near the inner periphery with two discharge-pipes n n, one on each side, and tlie apertures for the said discharges must be lmade ,throughv the sides of the said case at or about the levelot' theaxis ot' the shaft, and they must be curved upward as represented in the drawings, so that some portion of their length shall be 'about on a level with the upper part of thecase, so that the discharge shall be effected only by the pressure of the air,to prevent any escape of the ore or rock before being thoroughly pulverized. y The ore or lumps of rock are reduced in the first case A by the beaters, and when partially reduced are` gradually carried toward and out through The apertures leading into theseI the two pipes m m by centrifugal force,y and the pressure ot' the air induced by centrifugal force, aided by the exhaust induced near the shaft in the case A by the rotation ot' the4 beaters within the case A 5 and when the maferial so partially reduced enters the case A', itis forced toward and against theinner'periphery of the case, and there reduced to a fine powder, which. is forced out through the discharge-pipes by the pressure ot' the air. For the convenience of repairs, the sides of the cases are provided with man-holes and covers O.

What I claim as my invention, and desire to secure by Letters Patent, is-

1.. The combination ot the two cases` with their rotating beat-ers by meanszofl connectingpipes from or near the center ofthe first, and

delivering` to the second between the center and the periphery, substantially as'described,- the first case being provided with a-feedingr. l

tube, and the last with discharge-pipes, when ali these parts are constructed and arranged as described. r

2. The arrangement of the two beaterwheels D D in combination with the arrangement of the feeding-tube l and the two pipes =m; mi for the passage of the material from the inside of the first to the inside ot' the second f case, when constructed and arranged substantially as shown, and for the purpose specified.

3. Making the faces of the beaters each of a separate plate, secured by a bolt or equivaient means 13o-projectingflangeson the rotating disks vD D', when constructed and arranged substantially as described, so that they v can be readily replaced when worn.

V. B. RYERSON. Witnesses:

ANDREW DEI LACY', -EL MACK. 

